Probing Psyche: Mission Overview and Operations Concept

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Probing Psyche: Mission Overview and Operations Concept Carol Polanskey Jet Propulsion Laboratory, California Institute of Technology L. T. Elkins-Tanton (ASU), N. Amiri (JPL), S. H. Bairstow (JPL), T. D. Drain (JPL), D. J. Lawrence (JPL), W. Hart (JPL), S. Marchi (SWRI), D. Y. Oh (JPL), R. Oran (MIT), T. H. Prettyman (PSI), C. T. Russell (UCLA), D. A. Seal (JPL), D. Wenkert (JPL), D. Williams (ASU), and the Psyche Team June 14, 2018 This page contains restrictedCopyright information and 2018. is subject to theAll restrictions rights on the reserved title page of this document.. Government sponsorship acknowledged.J-1 What do we know about (16) Psyche? Tenth largest asteroid in the Main Belt Largest M-type asteroid with diameter of 226 km High radar albedo of 0.37 consistent with iron-nickel High thermal inertia of ~120 J m-2 S-0.5 K-1 High density – estimates between 4,500 kg/m3 to 6,980 kg/m3 Psyche is likely the stripped core of an early planetesimal Predecisional information, for planning and discussion only 2 Science Objectives Objective A: Determine whether Psyche is a core, or if it is unmelted material. Objective B: Determine the relative ages of Psyche’s surface regions. Objective C: Determine the global abundances, in portions of Psyche's surface that appear to be a metal phase, of light elements S, K, and Si. Objective D: Determine whether Psyche was formed under more oxidizing or more reducing conditions than Earth's core. Objective E: Characterize Psyche’s topography. Predecisional information, for planning and discussion only 3 Psyche is a massive body with unknown Gravity Dawn NEAR OSIRIS-REx Psyche Eros R = 16 km Bennu M = (0.00024)MPsyche R = ~0.25 km M = (0.000000003)MPsyche Psyche R = 113 km Vesta R = 265 km Psyche Predecisional information, for planning and discussion only M = 9M 4 Psyche’s Payload: Three simple science instruments Gravity Science Gamma Ray and +Z (MIT/JPL) Neutron Spectrometer +Z +X +Y +Y +X (APL) Magnetometer Sensors UCLA/MIT 3.1m Multispectral Imagers ASU/MSSS 2.4m 2.4 m Spacecraft chassis built by SSL Avionics, flight software, communications, and fault protection by JPL Predecisional information, for planning and discussion only Artist's concept of baseline spacecraft configuration 5 Planned interplanetary trajectory Launch − August 2022 Mars Gravity Assist − May 2023 Capture − January 2026 End of Operations − October 2027 Predecisional information, for planning and discussion only 6 Psyche mission planned science orbits Predecisional information, for planning and discussion only 7 Orbit A Orbit B Orbit C Orbit D 35 m/pixel 15 m/pixel 9 m/pixel 4 m/pixel Predecisional information, for planning and discussion only Typical orbit scenario Predecisional information, for planning and discussion only 9 Psyche: Journey to a Metal World Unique target body High heritage instrument suite Heritage operations concept => To observe for the first time, a planetary core Predecisional information, for planning and discussion only.

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